<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<!-- 轮播图 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item,i) in goods_info.pics" :key="i">
				<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<view class="price">￥{{goods_info.goods_price}}</view>
			<view class="goods-info-body">
				<view class="goods-name">
					{{goods_info.goods_name}}
				</view>
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<view class="yf">快递:免运费 </view>
		</view>
		<!-- 商品详情信息 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		
		<!-- 商品导航组件 -->
		<!-- fill 控制右侧按钮的样式   false(方形)  true(圆形)-->
		<!-- options/buttonGroup   左、右侧按钮配置项  -->
		<!-- @click/@buttonClick   左、右侧按钮 点击事件  -->
		<view class="goods-nav">
			<uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	import { mapState,mapMutations,mapGetters } from 'vuex'
	export default {
		computed:{
			...mapState('m_cart',[]),
			...mapGetters('m_cart',['total'])	   
		},
		watch:{
			// 页面首次加载完毕后，不会调用这个侦听器
		/*  total(newVal) {
			      const findResult = this.options.find(x => x.text === '购物车')
			      if (findResult) {
			         findResult.info = newVal
			      }
			   } */
			   
			total:{
				// handler 属性用来定义侦听器的 function 处理函数
				handler(newVal){
					const findResult = this.options.find(x => x.text == '购物车')
					// 动态为购物车按钮的 info 属性赋值
					if(findResult){
						findResult.info = newVal
					}
				},
				// immediate 属性用来声明此侦听器，是否在页面初次加载完毕后立即调用
				immediate:true
			}

		},
		data() {
			return {
				// 商品详情对象
				goods_info:{},
				
				options: [{
							icon: 'shop',
							text: '店铺',
							info: 1,
							infoBackgroundColor: '#007aff',
							infoColor: "#f5f5f5"
						}, {
							icon: 'cart',
							text: '购物车',
							info: 0
						}],
				buttonGroup: [{
						text: '加入购物车',
						backgroundColor: 'linear-gradient(90deg, #FFCD1E, #FF8A18)',
						color: '#fff'
					},
					{
						text: '立即购买',
						backgroundColor: 'linear-gradient(90deg, #FE6035, #EF1224)',
						color: '#fff'
					}
				],
			}
		},
	    onLoad(options){
		    const goods_id = options.goods_id
		    this.getGoodsDetail(goods_id)
		},
		methods: {
			// 把 m_cart 模块中的 addToCart 方法映射到当前页面使用
			...mapMutations('m_cart',['addToCart']),
			async getGoodsDetail(goods_id){
				const { data:res } = await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
				if(res.meta.status !== 200)  return uni.$showMsg()
				
				// 使用字符串的replace()方法，为img标签添加行内的 style 样式，从而解决图片底部空白间隙的问题  xxx.replace(/<img /g,'<img style="display:block" ')
				// 解决 .webp 格式图片在 ios 设备上无法正常显示的问题： xxx.replace(/webp/g, 'jpg')
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,'<img style="display:block" ').replace(/webp/g, 'jpg')
				this.goods_info = res.message
			},
			// 轮播图片预览
			preview(i){
				uni.previewImage({
					current:i,   // 预览时，默认显示图片的索引
					// 所有图片 url 地址的路径
					urls: this.goods_info.pics.map(x => x.pics_big),
				});
			},
			// 左侧按钮的点击事件处理函数
			onClick(e){
				console.log(e)
				if(e.content.text == '购物车'){
					uni.switchTab({
						url:'/pages/cart/cart'
					})
				}
			},
			
			buttonClick(e){
				console.log(e)
				// 1. 判断是否点击了 加入购物车 按钮
				if(e.content.text == '加入购物车'){
					// 2. 组织一个商品的信息对象
					// { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
					const goods = {
						goods_id:this.goods_info.goods_id,
						goods_name:this.goods_info.goods_name,
						goods_price:this.goods_info.goods_price,
						goods_count:1,
						goods_small_logo:this.goods_info.goods_small_logo,
						goods_state: true  // 商品的勾选状态
					}
					console.log(goods,'goodsgoodsgoodsgoodsgoods')
					// 3. 通过 this 调用映射过来的 addToCart 方法，把商品信息对象存储到购物车中
					this.addToCart(goods)
				}
			}
			
			
			 
		}
	}
</script>

<style lang="scss">
	swiper{
		height: 750rpx;
		
		image{
			width: 100%;
			height: 100%;
		}
	}
	.goods-info-box{
		padding:10px;
		.price {
		    color: #c00000;
		    font-size: 18px;
		    margin: 10px 0;
		}
		.goods-info-body{
			display: flex;
			justify-content: space-between;
			.goods-name{
				font-size: 13px;
				padding-right: 10px;
			}
			.favi{
				width: 120px;
				display: flex;
				flex-direction: column;
				align-items: center;
				font-size:12px;
				color: gray;
				border-left: 1px solid #efefef;	      
			}
		}
		.yf {
		    margin: 10px 0;
		    font-size: 12px;
		    color: gray;
		  }
	}
	.goods-nav{
		// 为商品导航组件添加固定定位
		position: fixed;
		left:0;
		bottom:0;
		width:100%;
	}
	.goods-detail-container{
		// 防止页面内容被底部的商品组件遮盖
		padding-bottom: 50px;
	}

</style>
